html,body{
    padding: 0;
    margin: 0;
    width: 100%;
    min-height: 100%
}
#container{
    text-align: center;
}
.imgbox {
    padding: 0;
}
.imgbox img{
    margin: 0;
    display: block;
}
.picbox {
    padding: 0;
    margin: 0;
    width: 100%;
    height: auto;    
}
.picbox img{
    background-size: contain;
    width: 100%;
    height: auto;
    display: block;
}